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o ��o_�� � @ s� d dl mZmZ d dlZd dlZd dlZd dlZd dlZd dlZd dl m Z d dl m Z d dl mZ zd dlZW n eyA Y nw d dlmZmZ d dlmZmZ d dlmZmZ d d lmZ d d l m Z d d l m Z d Z G d d� de!�Z"G dd� de!�Z#G dd� de$�Z%G dd� de$�Z&G dd� de&�Z'G dd� de&�Z(G dd� de&�Z)zd dl*m+Z+ W n ey� e$Z+Y nw G d d � d e+�Z,G d d � d e&�Z-G d d!� d!e&�Z.ej/d"kr�d#d$l0m1Z1 d+d&d'�Z2d(d)� Z3e4d*kr�e3� dS dS ),� )�division�print_functionN��wraps)�count)�WeakKeyDictionary)�StoppingContext�is_mouse_event)�PYTHON3�reraise)� command_map� REDRAW_SCREEN)� PopUpTarget)�signals)�INPUT_DESCRIPTORS_CHANGEDi c @ s e Zd ZdZdS )� ExitMainLoopz_ When this exception is raised within a main loop the main loop will exit cleanly. N)�__name__� __module__� __qualname__�__doc__� r r �1/usr/lib/python3/dist-packages/urwid/main_loop.pyr 2 s r c @ s e Zd ZdS )�CantUseExternalLoopN)r r r r r r r r 9 s r c @ s e Zd ZdZ d=dd�Zdd � Zed d � ed d �Zdd� Zedd � e�Z d>dd�Z d>dd�Z dd� Z dd� Z dd� Zdd � Zd d � Zd d � Zd!d"� Zd#d$� Zd%d&� Zd'd(� Zd)d*� Zd+d,� Zd-d.� Zd/d0� Zd1d2� Zd3d4� Zd5d6� Z d7d8� Z d9d:� Z d;d<� Z dS )?�MainLoopa� This is the standard main loop implementation for a single interactive session. :param widget: the topmost widget used for painting the screen, stored as :attr:`widget` and may be modified. Must be a box widget. :type widget: widget instance :param palette: initial palette for screen :type palette: iterable of palette entries :param screen: screen to use, default is a new :class:`raw_display.Screen` instance; stored as :attr:`screen` :type screen: display module screen instance :param handle_mouse: ``True`` to ask :attr:`.screen` to process mouse events :type handle_mouse: bool :param input_filter: a function to filter input before sending it to :attr:`.widget`, called from :meth:`.input_filter` :type input_filter: callable :param unhandled_input: a function called when input is not handled by :attr:`.widget`, called from :meth:`.unhandled_input` :type unhandled_input: callable :param event_loop: if :attr:`.screen` supports external an event loop it may be given here, default is a new :class:`SelectEventLoop` instance; stored as :attr:`.event_loop` :type event_loop: event loop instance :param pop_ups: `True` to wrap :attr:`.widget` with a :class:`PopUpTarget` instance to allow any widget to open a pop-up anywhere on the screen :type pop_ups: boolean .. attribute:: screen The screen object this main loop uses for screen updates and reading input .. attribute:: event_loop The event loop object this main loop uses for waiting on alarms and IO r NTFc C s� || _ || _|| _|sddlm} | �� }|r |�|� || _d | _|| _ || _ t |d�s8|d ur8t d|f ��|d u r?t � }|| _t | jd�rN| jj| j_i | _d S )Nr )� raw_display�hook_event_loopz=screen object passed %r does not support external event loops�signal_handler_setter)�_widget� handle_mouse�pop_ups�urwidr �Screen�register_palette�screen� screen_size�_unhandled_input� _input_filter�hasattr�NotImplementedError�SelectEventLoop� event_loop�set_signal_handlerr � _watch_pipes) �self�widget�paletter# r � input_filter�unhandled_inputr* r r r r r �__init__j s. � zMainLoop.__init__c C s& || _ | jr | j | j_d S | j | _d S �N)r r �_topmost_widget�original_widget)r- r. r r r � _set_widget� s zMainLoop._set_widgetc C � | j S r3 )r �r- r r r �<lambda>� � zMainLoop.<lambda>zj Property for the topmost widget used to draw the screen. This must be a box widget. )�docc C s& || _ |r t| j�| _d S | j| _d S r3 )�_pop_upsr r r4 )r- r r r r � _set_pop_ups� s zMainLoop._set_pop_upsc C r7 r3 )r< r8 r r r r9 � r: c s � ��fdd�}�j �||�S )a_ Schedule an alarm in *sec* seconds that will call *callback* from the within the :meth:`run` method. :param sec: seconds until alarm :type sec: float :param callback: function to call with two parameters: this main loop object and *user_data* :type callback: callable c � � ��� d S r3 r r ��callbackr- � user_datar r �cb� � z!MainLoop.set_alarm_in.<locals>.cb)r* �alarm)r- �secr@ rA rB r r? r � set_alarm_in� s zMainLoop.set_alarm_inc s& � ��fdd�}�j �|t�� |�S )a� Schedule an alarm at *tm* time that will call *callback* from the within the :meth:`run` function. Returns a handle that may be passed to :meth:`remove_alarm`. :param tm: time to call callback e.g. ``time.time() + 5`` :type tm: float :param callback: function to call with two parameters: this main loop object and *user_data* :type callback: callable c r> r3 r r r? r r rB � rC z!MainLoop.set_alarm_at.<locals>.cb)r* rD �time)r- �tmr@ rA rB r r? r � set_alarm_at� s zMainLoop.set_alarm_atc C � | j �|�S )zf Remove an alarm. Return ``True`` if *handle* was found, ``False`` otherwise. )r* � remove_alarm�r- �handler r r rK � � zMainLoop.remove_alarmc sT t �� \�}t��tjt j� d�� ���fdd�}�j��|����f�j|< |S )a� Create a pipe for use by a subprocess or thread to trigger a callback in the process/thread running the main loop. :param callback: function taking one parameter to call from within the process/thread running the main loop :type callback: callable This method returns a file descriptor attached to the write end of a pipe. The read end of the pipe is added to the list of files :attr:`event_loop` is watching. When data is written to the pipe the callback function will be called and passed a single value containing data read from the pipe. This method may be used any time you want to update widgets from another thread or subprocess. Data may be written to the returned file descriptor with ``os.write(fd, data)``. Ensure that data is less than 512 bytes (or 4K on Linux) so that the callback will be triggered just once with the complete value of data passed in. If the callback returns ``False`` then the watch will be removed from :attr:`event_loop` and the read end of the pipe will be closed. You are responsible for closing the write end of the pipe with ``os.close(fd)``. Nc s: t ��t�} � | �}|du r�j��� t ��� d S d S �NF)�os�read�PIPE_BUFFER_READ_SIZEr* �remove_watch_file�close)�data�rval�r@ �pipe_rdr- � watch_handler r rB � s �z MainLoop.watch_pipe.<locals>.cb)rP �pipe�fcntl�F_SETFL� O_NONBLOCKr* � watch_filer, )r- r@ �pipe_wrrB r rW r � watch_pipe� s zMainLoop.watch_pipec C sH z | j �|�\}}W n ty Y dS w | j�|�s dS t�|� dS )z� Close the read end of the pipe and remove the watch created by :meth:`watch_pipe`. You are responsible for closing the write end of the pipe. Returns ``True`` if the watch pipe exists, ``False`` otherwise FT)r, �pop�KeyErrorr* rS rP rT )r- �write_fdrY rX r r r �remove_watch_pipe� s � zMainLoop.remove_watch_pipec C � | j �||�S )z� Call *callback* when *fd* has some data to read. No parameters are passed to callback. Returns a handle that may be passed to :meth:`remove_watch_file`. )r* r^ �r- �fdr@ r r r r^ � zMainLoop.watch_filec C rJ )zn Remove a watch file. Returns ``True`` if the watch file exists, ``False`` otherwise. )r* rS rL r r r rS rN zMainLoop.remove_watch_filec C s$ z| � � W dS ty Y dS w )an Start the main loop handling input events and updating the screen. The loop will continue until an :exc:`ExitMainLoop` exception is raised. If you would prefer to manage the event loop yourself, don't use this method. Instead, call :meth:`start` before starting the event loop, and :meth:`stop` once it's finished. N)�_runr r8 r r r �run s �z MainLoop.runc C � dS )a- >>> w = _refl("widget") # _refl prints out function calls >>> w.render_rval = "fake canvas" # *_rval is used for return values >>> scr = _refl("screen") >>> scr.get_input_descriptors_rval = [42] >>> scr.get_cols_rows_rval = (20, 10) >>> scr.started = True >>> scr._urwid_signals = {} >>> evl = _refl("event_loop") >>> evl.enter_idle_rval = 1 >>> evl.watch_file_rval = 2 >>> ml = MainLoop(w, [], scr, event_loop=evl) >>> ml.run() # doctest:+ELLIPSIS screen.start() screen.set_mouse_tracking() screen.unhook_event_loop(...) screen.hook_event_loop(...) event_loop.enter_idle(<bound method MainLoop.entering_idle...>) event_loop.run() event_loop.remove_enter_idle(1) screen.unhook_event_loop(...) screen.stop() >>> ml.draw_screen() # doctest:+ELLIPSIS screen.get_cols_rows() widget.render((20, 10), focus=True) screen.draw_screen((20, 10), 'fake canvas') Nr r8 r r r � _test_run# � zMainLoop._test_runc C sx | j �� | jr | j �� t| j d�std��z t�| j t| j � W n t y+ Y nw | � � | j � | j �| _t| �S )a Sets up the main loop, hooking into the event loop where necessary. Starts the :attr:`screen` if it hasn't already been started. If you want to control starting and stopping the event loop yourself, you should call this method before starting, and call `stop` once the loop has finished. You may also use this method as a context manager, which will stop the loop automatically at the end of the block: with main_loop.start(): ... Note that some event loop implementations don't handle exceptions specially if you manage the event loop yourself. In particular, the Twisted and asyncio loops won't stop automatically when :exc:`ExitMainLoop` (or anything else) is raised. r z1Screen {0!r} doesn't support external event loops)r# �startr �set_mouse_trackingr' r r �connect_signalr �_reset_input_descriptors� NameErrorr* � enter_idle� entering_idle� idle_handler r8 r r r rn @ s" � � �zMainLoop.startc C s@ | j �| j� | `t�| jt| j� | j�| j � | j� � dS )z� Cleans up any hooks added to the event loop. Only call this if you're managing the event loop yourself, after the loop stops. N) r* �remove_enter_idleru r �disconnect_signalr# r rq �unhook_event_loop�stopr8 r r r ry f s �z MainLoop.stopc C s$ | j �| j� | j �| j| j� d S r3 )r# rx r* r �_updater8 r r r rq s s z!MainLoop._reset_input_descriptorsc C sp z| � � W n ty z | �� W | j�� Y S | j�� w w z| j�� W n | j�� � | �� d S r3 )rn r �_run_screen_event_loopr# ry r* rj r8 r r r ri w s � z MainLoop._runc C s4 | � ||�}|r| �|� d|v rd| _dS dS dS )a� >>> w = _refl("widget") >>> w.selectable_rval = True >>> w.mouse_event_rval = True >>> scr = _refl("screen") >>> scr.get_cols_rows_rval = (15, 5) >>> evl = _refl("event_loop") >>> ml = MainLoop(w, [], scr, event_loop=evl) >>> ml._input_timeout = "old timeout" >>> ml._update(['y'], [121]) # doctest:+ELLIPSIS screen.get_cols_rows() widget.selectable() widget.keypress((15, 5), 'y') >>> ml._update([("mouse press", 1, 5, 4)], []) widget.mouse_event((15, 5), 'mouse press', 1, 5, 4, focus=True) >>> ml._update([], []) � window resizeN)r0 � process_inputr$ �r- �keys�rawr r r rz � s �zMainLoop._updatec C s d} | � � |s| jjrt�| jj�}d}|sM|r,td|d t�� �}| j�|� n| j�d� | j� d�\}}|sK|rK|d t�� }|dkrKn|r| � ||�}|rZ| � |� |r�|d t�� }|dkrin|\}}}|� | jjr}t�| jj�}nd}|s\d|v r�d| _ q)z� This method is used when the screen does not support using external event loops. The alarms stored in the SelectEventLoop in :attr:`event_loop` are modified by this method. NTr r| ) � draw_screenr* �_alarms�heapq�heappop�maxrG r# �set_input_timeouts� get_inputr0 r} r$ )r- � next_alarmr rE r� rH � tie_breakr@ r r r r{ � sB � � �z MainLoop._run_screen_event_loopc C rk )aq >>> w = _refl("widget") >>> scr = _refl("screen") >>> scr.get_cols_rows_rval = (10, 5) >>> scr.get_input_rval = [], [] >>> ml = MainLoop(w, screen=scr) >>> def stop_now(loop, data): ... raise ExitMainLoop() >>> handle = ml.set_alarm_in(0, stop_now) >>> try: ... ml._run_screen_event_loop() ... except ExitMainLoop: ... pass screen.get_cols_rows() widget.render((10, 5), focus=True) screen.draw_screen((10, 5), None) screen.set_input_timeouts(0) screen.get_input(True) Nr r8 r r r �_test_run_screen_event_loop� rm z$MainLoop._test_run_screen_event_loopc C s� | j s | j�� | _ d}|D ]P}|dkrq t|�r4|\}}}}t| jd�r3| jj| j ||||dd�r3d}n | j�� rA| j�| j |�}|r[t | t krQ| j� � d}q |t | � |��O }q d}q |S )a� This method will pass keyboard input and mouse events to :attr:`widget`. This method is called automatically from the :meth:`run` method when there is input, but may also be called to simulate input from the user. *keys* is a list of input returned from :attr:`screen`'s get_input() or get_input_nonblocking() methods. Returns ``True`` if any key was handled by a widget or the :meth:`unhandled_input` method. Fr| � mouse_eventT��focusN)r$ r# � get_cols_rowsr r' r4 r� � selectable�keypressr r �clear�boolr1 )r- r �something_handled�k�event�button�col�rowr r r r} � s. �� zMainLoop.process_inputc C rk )a� >>> w = _refl("widget") >>> w.selectable_rval = True >>> scr = _refl("screen") >>> scr.get_cols_rows_rval = (10, 5) >>> ml = MainLoop(w, [], scr) >>> ml.process_input(['enter', ('mouse drag', 1, 14, 20)]) screen.get_cols_rows() widget.selectable() widget.keypress((10, 5), 'enter') widget.mouse_event((10, 5), 'mouse drag', 1, 14, 20, focus=True) True Nr r8 r r r �_test_process_input rm z MainLoop._test_process_inputc C s | j r | � ||�S |S )av This function is passed each all the input events and raw keystroke values. These values are passed to the *input_filter* function passed to the constructor. That function must return a list of keys to be passed to the widgets to handle. If no *input_filter* was defined this implementation will return all the input events. )r& r~ r r r r0 s zMainLoop.input_filterc C s | j r| � |�S dS )a� This function is called with any input that was not handled by the widgets, and calls the *unhandled_input* function passed to the constructor. If no *unhandled_input* was defined then the input will be ignored. *input* is the keyboard or mouse input. The *unhandled_input* function should return ``True`` if it handled the input. N)r% )r- �inputr r r r1 ( s �zMainLoop.unhandled_inputc C s | j jr | �� dS dS )z� This method is called whenever the event loop is about to enter the idle state. :meth:`draw_screen` is called here to update the screen when anything has changed. N)r# �startedr� r8 r r r rt 7 s �zMainLoop.entering_idlec C s8 | j s | j�� | _ | jj| j dd�}| j�| j |� dS )a5 Render the widgets and paint the screen. This method is called automatically from :meth:`entering_idle`. If you modify the widgets displayed outside of handling input or responding to an alarm you will need to call this method yourself to repaint the screen. Tr� N)r$ r# r� r4 �renderr� )r- �canvasr r r r� @ s zMainLoop.draw_screen)r NTNNNFr3 ) r r r r r2 r6 �propertyr. r= r rF rI rK r` rd r^ rS rj rl rn ry rq ri rz r{ r� r} r� r0 r1 rt r� r r r r r < sD - �# � + & 1' r c @ sP e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dd� Z dd� Z dS )� EventLoopzT Abstract class representing an event loop to be used by :class:`MainLoop`. c C � t � �)aW Call callback() a given time from now. No parameters are passed to callback. This method has no default implementation. Returns a handle that may be passed to remove_alarm() seconds -- floating point time to wait before calling callback callback -- function to call from event loop �r( �r- �secondsr@ r r r rD U � zEventLoop.alarmc C r� )z� Add a callback for entering idle. This method has no default implementation. Returns a handle that may be passed to remove_idle() r� �r- r@ r r r rs c � zEventLoop.enter_idlec C r� )z� Remove an alarm. This method has no default implementation. Returns True if the alarm exists, False otherwise r� rL r r r rK m r� zEventLoop.remove_alarmc C r� )z� Remove an idle callback. This method has no default implementation. Returns True if the handle was removed. r� rL r r r rv w r� zEventLoop.remove_enter_idlec C r� )z� Remove an input file. This method has no default implementation. Returns True if the input file exists, False otherwise r� rL r r r rS � r� zEventLoop.remove_watch_filec C r� )z� Start the event loop. Exit the loop when any callback raises an exception. If ExitMainLoop is raised, exit cleanly. This method has no default implementation. r� r8 r r r rj � s z EventLoop.runc C r� )aV Call callback() when fd has some data to read. No parameters are passed to callback. This method has no default implementation. Returns a handle that may be passed to remove_watch_file() fd -- file descriptor to watch for input callback -- function to call when input is available r� rf r r r r^ � r� zEventLoop.watch_filec C s t � ||�S )a� Sets the signal handler for signal signum. The default implementation of :meth:`set_signal_handler` is simply a proxy function that calls :func:`signal.signal()` and returns the resulting value. signum -- signal number handler -- function (taking signum as its single argument), or `signal.SIG_IGN`, or `signal.SIG_DFL` )�signal)r- �signum�handlerr r r r+ � s z EventLoop.set_signal_handlerN) r r r r rD rs rK rv rS rj r^ r+ r r r r r� P s r� c @ s` e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dd� Z dd� Z dd� Z dd� Z dS )r) z3 Event loop based on :func:`select.select` c C s$ g | _ i | _d| _i | _t� | _d S �Nr )r� � _watch_files� _idle_handle�_idle_callbacksr � _tie_breakr8 r r r r2 � s zSelectEventLoop.__init__c C s. t � � | }|t| j�|f}t�| j|� |S ��# Call callback() a given time from now. No parameters are passed to callback. Returns a handle that may be passed to remove_alarm() seconds -- floating point time to wait before calling callback callback -- function to call from event loop )rG �nextr� r� �heappushr� )r- r� r@ rH rM r r r rD � s zSelectEventLoop.alarmc C s4 z| j �|� t�| j � W dS ty Y dS w )�] Remove an alarm. Returns True if the alarm exists, False otherwise TF)r� �remover� �heapify� ValueErrorrL r r r rK � s �z SelectEventLoop.remove_alarmc C s || j |< |S ��" Call callback() when fd has some data to read. No parameters are passed to callback. Returns a handle that may be passed to remove_watch_file() fd -- file descriptor to watch for input callback -- function to call when input is available �r� rf r r r r^ � s zSelectEventLoop.watch_filec C s || j v r | j |= dS dS ��g Remove an input file. Returns True if the input file exists, False otherwise TFr� rL r r r rS � s z!SelectEventLoop.remove_watch_filec C � | j d7 _ || j| j < | j S )�q Add a callback for entering idle. Returns a handle that may be passed to remove_idle() � �r� r� r� r r r rs � � zSelectEventLoop.enter_idlec C �$ z| j |= W dS ty Y dS w ��[ Remove an idle callback. Returns True if the handle was removed. FT�r� rb rL r r r rv � � ��z!SelectEventLoop.remove_enter_idlec C s | j �� D ]}|� qdS )z9 Call all the registered idle callbacks. N)r� �valuesr� r r r �_entering_idle s �z SelectEventLoop._entering_idlec C sd z'd| _ z| �� W n tjy& } z|jd dkr � W Y d}~nd}~ww q ty1 Y dS w )�� Start the event loop. Exit the loop when any callback raises an exception. If ExitMainLoop is raised, exit cleanly. Tr � N)�_did_something�_loop�select�error�argsr )r- �er r r rj s ���� �zSelectEventLoop.runc C s� t | j�� �}| js | jr=| jr | jd d }td|t�� �}| jr1| jr-| jr1|dkr1d}d}t�|g ||�\}}}n d}t�|g |�\}}}|sj|dkrW| �� d| _n|durjt � | j�\}}}|� d| _|D ] } | j| � d| _qldS )z6 A single iteration of the event loop r �idleNFT) �listr� r r� r� r� rG r� r� r� r� ) r- �fdsrH �timeout�ready�w�errr� �alarm_callbackrg r r r r� s4 � �zSelectEventLoop._loopN)r r r r r2 rD rK r^ rS rs rv r� rj r� r r r r r) � s r) c @ sp e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� ZdS )� GLibEventLoopz+ Event loop based on GLib.MainLoop c C sR ddl m} || _g | _i | _d| _d| _i | _|�� | _d | _ | � � i | _ d S )Nr )�GLibF) � gi.repositoryr� r� r� r� �_glib_idle_enabledr� r r� � _exc_info�_enable_glib_idle�_signal_handlers)r- r� r r r r2 D s zGLibEventLoop.__init__c s> �j � �fdd��}�j�t|d �|�}�j�|� |� fS )r� c � � � �� � dS rO �r� r �r@ r- r r � ret_false[ � z&GLibEventLoop.alarm.<locals>.ret_falsei� )� handle_exitr� � timeout_add�intr� �append)r- r� r@ r� rg r r� r rD Q s zGLibEventLoop.alarmc s� t jt jt jt jt jg}�j�ddd�s|�t j � ||vr dS |�j v r/�j� �j � |�� � t j kr9dd� � n� t jkr@dS � �fdd�}�j��jj|||�}|�j |< dS ) a� Sets the signal handler for signal signum. .. WARNING:: Because this method uses the `GLib`-specific `unix_signal_add` function, its behaviour is different than `signal.signal().` If `signum` is not `SIGHUP`, `SIGINT`, `SIGTERM`, `SIGUSR1`, `SIGUSR2` or `SIGWINCH`, this method performs no actions and immediately returns None. Returns None in all cases (unlike :func:`signal.signal()`). .. signum -- signal number handler -- function (taking signum as its single argument), or `signal.SIG_IGN`, or `signal.SIG_DFL` � �6 r Nc S s d S r3 r )�xr r r r9 � rm z2GLibEventLoop.set_signal_handler.<locals>.<lambda>c s � | � �j jS r3 )r� �SOURCE_CONTINUE)� signal_number�r� r- r r � final_handler� s z7GLibEventLoop.set_signal_handler.<locals>.final_handler)r� �SIGHUP�SIGINT�SIGTERM�SIGUSR1�SIGUSR2r� � check_versionr� �SIGWINCHr� � source_removera �SIG_IGN�SIG_DFL�unix_signal_add�PRIORITY_DEFAULT)r- r� r� � glib_signalsr� �sourcer r� r r+ d s& � z GLibEventLoop.set_signal_handlerc C s< z| j �|d � | j�|d � W dS ty Y dS w )r� r TF)r� r� r� r� r� rL r r r rK � s �zGLibEventLoop.remove_alarmc s2 �j � �fdd��}�j�|�jj|��j|< |S )r� c r� �NTr� )r� � cb_conditionr� r r � io_callback� r� z-GLibEventLoop.watch_file.<locals>.io_callback)r� r� � io_add_watch�IO_INr� )r- rg r@ r� r r� r r^ � s �zGLibEventLoop.watch_filec C �, || j v r| j�| j | � | j |= dS dS r� )r� r� r� rL r r r rS � � z GLibEventLoop.remove_watch_filec C r� �zw Add a callback for entering idle. Returns a handle that may be passed to remove_enter_idle() r� r� r� r r r rs � r� zGLibEventLoop.enter_idlec C s" | j rd S | j�| j� d| _ d S r� )r� r� �idle_add�_glib_idle_callbackr8 r r r r� � s z GLibEventLoop._enable_glib_idlec C s | j �� D ]}|� qd| _dS rO )r� r� r� r� r r r r � s z!GLibEventLoop._glib_idle_callbackc C r� r� r� rL r r r rv � r� z GLibEventLoop.remove_enter_idlec C s^ z| j �� W | j �� r| j �� n | j �� r | j �� w w | jr-| j}d| _t|� dS dS �r� N)r� rj � is_running�quitr� r �r- �exc_infor r r rj � s � � � �zGLibEventLoop.runc s � �fdd�}|S )a, Decorator that cleanly exits the :class:`GLibEventLoop` if :exc:`ExitMainLoop` is thrown inside of the wrapped function. Store the exception info if some other exception occurs, it will be reraised after the loop quits. *f* -- function to be wrapped c sf z� | i |��W S t y �j�� Y dS dd l}|�� �_�j�� r0�j�� Y dS Y dS )Nr F)r r� r �sysr r� r )r� �kargsr ��fr- r r �wrapper� s � �z*GLibEventLoop.handle_exit.<locals>.wrapperr )r- r r r r r r� � s zGLibEventLoop.handle_exitN)r r r r r2 rD r+ rK r^ rS rs r� r rv rj r� r r r r r� ? s 2 r� c @ s� e Zd ZdZe� ZdZG dd� de�Ze dd� �Z ddd �Z d d � Z d d � Z dd� Zdd� Zdd� Zdd� Zdd� Zdd� ZdS )�TornadoEventLoopa^ This is an Urwid-specific event loop to plug into its MainLoop. It acts as an adaptor for Tornado's IOLoop which does all heavy lifting except idle-callbacks. Notice, since Tornado has no concept of idle callbacks we monkey patch ioloop._impl.poll() function to be able to detect potential idle periods. r c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) zTornadoEventLoop.PollProxyz� A simple proxy for a Python's poll object that wraps the .poll() method in order to detect idle periods and call Urwid callbacks c C s || _ || _d| _d| _d S )NFr )�_PollProxy__poll_obj�_PollProxy__idle_map� _idle_done� _prev_timeout)r- �poll_obj�idle_mapr r r r2 s z#TornadoEventLoop.PollProxy.__init__c C s t | j|�S r3 )�getattrr )r- �namer r r � __getattr__! s z&TornadoEventLoop.PollProxy.__getattr__c C s� || j krd| _|| _ t�� }| j�d�}|r d| _|S | js-| j�� D ]}|� q$d| _tdt||| t�� ��}| j�|�}|rFd| _|S )NFr T) r r rG r �pollr r� r� �min)r- r� rn �eventsr@ r r r r $ s" z TornadoEventLoop.PollProxy.pollN)r r r r r2 r r r r r r � PollProxy s r c C s0 || j v rdS i | j |< }| �|j|�|_dS )z@ Wraps original poll object in the IOLoop's poll object N)�_ioloop_registryr �_impl)�cls�ioloopr r r r �_patch_poll_impl> s z!TornadoEventLoop._patch_poll_implNc C sD |s ddl m} |�� }|| _| �|� i | _i | _d| _d | _d S )Nr ��IOLoop) �tornado.ioloopr% �instance�_ioloopr# �_pending_alarms�_watch_handles�_max_watch_handle� _exception)r- r" r% r r r r2 I s zTornadoEventLoop.__init__c s8 �j }� ��fdd�}|�|�� | |��d�j�< �S )Nc s0 z�j �= W n ty Y nw ��� �� d S r3 )r) rb r� r �r@ rM r- r r �wrappedV s �z'TornadoEventLoop.alarm.<locals>.wrappedr� )r( � add_timeoutrG r) )r- �secsr@ r" r. r r- r rD T s zTornadoEventLoop.alarmc C s0 | j �|� z| j|= W dS ty Y dS w �NFT)r( �remove_timeoutr) rb rL r r r rK ` s ��z TornadoEventLoop.remove_alarmc sN ddl m} � �fdd�}�j�|||j� � jd7 _�j}|�j|< |S )Nr r$ c s �� � �� S r3 )r� )rg r r� r r r9 k s z-TornadoEventLoop.watch_file.<locals>.<lambda>r� )r& r% r( � add_handler�READr+ r* )r- rg r@ r% r� rM r r� r r^ i s zTornadoEventLoop.watch_filec C s* | j �|d �}|d u r dS | j�|� dS r1 )r* ra r( �remove_handler)r- rM rg r r r rS r s z"TornadoEventLoop.remove_watch_filec C s, | j d7 _ | j }| j| j }|||< |S )Nr� )�_max_idle_handler r( )r- r@ rM r r r r rs z s zTornadoEventLoop.enter_idlec C s | j | j }|�|d �}|d uS r3 )r r( ra )r- rM r rB r r r rv � s z"TornadoEventLoop.remove_enter_idlec s t � �� �fdd��}|S )Nc sd z� | i |��W S t y �j�� Y dS ty1 } z|�_�j�� W Y d }~dS d }~ww rO )r r( ry � Exceptionr, )r� �kw�exc��funcr- r r r � s ���z-TornadoEventLoop.handle_exit.<locals>.wrapperr )r- r; r r r: r r� � s z TornadoEventLoop.handle_exitc C s& | j �� | jr| jd }| _|�d S r3 )r( rn r, )r- r9 r r r rj � s �zTornadoEventLoop.runr3 )r r r r r r r6 �objectr � classmethodr# r2 rD rK r^ rS rs rv r� rj r r r r r s ' r )�FileDescriptorc @ s$ e Zd Zdd� Zdd� Zdd� ZdS )�TwistedInputDescriptorc C s || _ || _t�| |� d S r3 )�_filenorB r> r2 )r- �reactorrg rB r r r r2 � s z TwistedInputDescriptor.__init__c C r7 r3 )r@ r8 r r r �fileno� s z TwistedInputDescriptor.filenoc C s | � � S r3 )rB r8 r r r �doRead� s z TwistedInputDescriptor.doReadN)r r r r2 rB rC r r r r r? � s r? c @ sp e Zd ZdZdZddd�Zdd� Zd d � Zd d � Zd d� Z dd� Z dd� Z dd� Z dd� Z dd� Zd dd�ZdS ) �TwistedEventLoopz& Event loop based on Twisted_ g p?NTc C sT |du r ddl }|jj}|| _g | _i | _d| _d| _i | _d| _|| _ | � � dS )a- :param reactor: reactor to use :type reactor: :class:`twisted.internet.reactor`. :param: manage_reactor: `True` if you want this event loop to run and stop the reactor. :type manage_reactor: boolean .. WARNING:: Twisted's reactor doesn't like to be stopped and run again. If you need to stop and run your :class:`MainLoop`, consider setting ``manage_reactor=False`` and take care of running/stopping the reactor at the beginning/ending of your program yourself. You can also forego using :class:`MainLoop`'s run() entirely, and instead call start() and stop() before and after starting the reactor. .. _Twisted: http://twistedmatrix.com/trac/ Nr F) �twisted.internet.reactor�internetrA r� r� r� �_twisted_idle_enabledr� r� �manage_reactor�_enable_twisted_idle)r- rA rH �twistedr r r r2 � s zTwistedEventLoop.__init__c C s | j �|| �|��}|S r� )rA � callLaterr� )r- r� r@ rM r r r rD � s zTwistedEventLoop.alarmc C sF ddl m}m} z|�� W dS |y Y dS |y" Y dS w )r� r )�AlreadyCancelled� AlreadyCalledTF)�twisted.internet.errorrL rM �cancel)r- rM rL rM r r r rK � s �z TwistedEventLoop.remove_alarmc C s. t | j|| �|��}|| j|< | j�|� |S r� )r? rA r� r� � addReader)r- rg r@ �indr r r r^ � s � zTwistedEventLoop.watch_filec C r r� )r� rA � removeReaderrL r r r rS � r z"TwistedEventLoop.remove_watch_filec C r� r r� r� r r r rs r� zTwistedEventLoop.enter_idlec C s0 | j rdS | j�| j| j| jdd�� d| _ dS )aU Twisted's reactors don't have an idle or enter-idle callback so the best we can do for now is to set a timer event in a very short time to approximate an enter-idle callback. .. WARNING:: This will perform worse than the other event loops until we can find a fix or workaround NF)� enable_idleT)rG rA rK �_idle_emulation_delayr� �_twisted_idle_callbackr8 r r r rI s � z%TwistedEventLoop._enable_twisted_idlec C s | j �� D ]}|� qd| _d S rO )r� r� rG r� r r r rU % s z'TwistedEventLoop._twisted_idle_callbackc C r� r� r� rL r r r rv * r� z"TwistedEventLoop.remove_enter_idlec C s6 | j sdS | j�� | jr| j}d| _t|� dS dS r )rH rA rj r� r r r r r rj 6 s �zTwistedEventLoop.runc s � ��fdd�}|S )a1 Decorator that cleanly exits the :class:`TwistedEventLoop` if :class:`ExitMainLoop` is thrown inside of the wrapped function. Store the exception info if some other exception occurs, it will be reraised after the loop quits. *f* -- function to be wrapped c s~ d }z �| i |��}W n+ t y �jr�j�� Y n dd l}t|�� � |�� �_�jr6�j�� Y � r=�� � |S r� ) r rH rA ry r �printr r� �crashrI )r� r rV r �rS r r- r r r M s" � �z-TwistedEventLoop.handle_exit.<locals>.wrapperr )r- r rS r r rX r r� D s z TwistedEventLoop.handle_exitr� )T)r r r r rT r2 rD rK r^ rS rs rI rU rv rj r� r r r r rD � s ! rD c @ sd e Zd ZdZdZdZdd� Zdd� Zdd � Zd d � Z d d � Z dd� Z dd� Z dZ dd� Zdd� ZdS )�AsyncioEventLoopa# Event loop based on the standard library ``asyncio`` module. ``asyncio`` is new in Python 3.4, but also exists as a backport on PyPI for Python 3.3. The ``trollius`` package is available for older Pythons with slightly different syntax, but also works with this loop. Fg�?c K s. d|v r |� d�| _d S dd l}|�� | _d S )N�loopr )ra r� �asyncio�get_event_loop)r- �kwargsr[ r r r r2 l s zAsyncioEventLoop.__init__c C re )a Call callback() a given time from now. No parameters are passed to callback. Returns a handle that may be passed to remove_alarm() seconds -- time in seconds to wait before calling callback callback -- function to call from event loop )r� � call_laterr� r r r rD s s zAsyncioEventLoop.alarmc C s, t |dd�r |�� n|j}| }|�� |S )r� � cancelledN)r r_ � _cancelledrO )r- rM r_ �existedr r r rK s ��z AsyncioEventLoop.remove_alarmc C s | j �||� |S r� )r� � add_readerrf r r r r^ � s zAsyncioEventLoop.watch_filec C rJ )r� )r� � remove_readerrL r r r rS � s z"AsyncioEventLoop.remove_watch_filec s0 dg�� ���fdd���j ��j���d< �S )r� Nc s � � �j ��j���d< d S r� �r� r^ rT r �r@ �faux_idle_callback�mutable_handler- r r rf � s �z7AsyncioEventLoop.enter_idle.<locals>.faux_idle_callbackr rd r� r re r rs � s �zAsyncioEventLoop.enter_idlec C s | � |d �S )r� r )rK rL r r r rv � rh z"AsyncioEventLoop.remove_enter_idleNc C sH |� d�}|r |�� t|t�st|�||jf| _d S d S |�|� d S )N� exception)�getry � isinstancer �type� __traceback__r� �default_exception_handler)r- rZ �contextr9 r r r �_exception_handler� s �z#AsyncioEventLoop._exception_handlerc C s: | j �| j� | j �� | jr| j}d| _t|� dS dS r )r� �set_exception_handlerro � run_foreverr� r r r r r rj � s �zAsyncioEventLoop.run)r r r r �_we_started_event_looprT r2 rD rK r^ rS rs rv r� ro rj r r r r rY ` s rY )� � r� )� TrioEventLoopFc s G � �fdd�dt �� � | �S )aO This function is used to test the main loop classes. >>> scr = _refl("screen") >>> scr.function("argument") screen.function('argument') >>> scr.callme(when="now") screen.callme(when='now') >>> scr.want_something_rval = 42 >>> x = scr.want_something() screen.want_something() >>> x 42 c s. e Zd Zddd�Z�fdd�Z� fdd�ZdS ) z_refl.<locals>.ReflectNc S s || _ || _d S r3 )�_name�_rval)r- r rV r r r r2 � s z _refl.<locals>.Reflect.__init__c sf d� dd� |D ��}|r|r|d }|d� dd� |�� D �� }t| jd | d � � r0t� �| jS )Nz, c S s g | ]}t |��qS r ��repr)�.0�ar r r � <listcomp>� s z3_refl.<locals>.Reflect.__call__.<locals>.<listcomp>c S s g | ] \}}|d t |� �qS )�=rx )rz r� �vr r r r| � s �(�))�join�itemsrV rv r rw )r- �argl�argdr� )�exitr r �__call__� s z _refl.<locals>.Reflect.__call__c sN |� d�rt� �t| |d �r � | jd | t| |d ��S � | jd | �S )Nrw �.)�endswith�AttributeErrorr' rv r )r- �attr)�Reflectr r r � s z"_refl.<locals>.Reflect.__getattr__r3 )r r r r2 r� r r �r� r� r r r� � s r� )r< )r rV r� r r� r �_refl� s r� c C s dd l } | �� d S r� )�doctest�testmod)r� r r r �_test s r� �__main__rO )5� __future__r r rG r� r� rP r� r � functoolsr � itertoolsr �weakrefr r[ � ImportError� urwid.utilr r � urwid.compatr r �urwid.command_mapr r � urwid.wimpr r r �urwid.display_commonr rR r7 r r r< r r� r) r� r �twisted.internet.abstractr> r? rD rY � version_info�_async_kw_event_loopru r� r� r r r r r �<module> sh � ` M � 5 { & �
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